Study on Preparation of Compound Activated Carbon Adsorbent and Effect of Thiophene Adsorption

摘要

The present work investigated the adsorption of thiophene on activated carbons impregnated with PdCl_2 and different kinds of nitrate. The activated carbon was deashed with HCl, oxided with HNO_3 and impregnated with PdCl_2 and one kind of nitrates in acidic media, followed by drying for 12h and roasting at 350°C under N_2 flow. Finally, the model diesel was adsorbed by adsorbent for 12h. They were characterized by N_2 adsorption isotherms, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and gas chromatography. Characterization results provided that the active components of PdCl_2 and Ni(NO_3)_2 were effectively supported on the activated carbon. Organic sulfur compounds are preferentially adsorbed and the desulfurization rate is up to 93.05%.